US20030015368A1 - Tension-adjustable mechanism for stethoscope earpieces - Google Patents
Tension-adjustable mechanism for stethoscope earpieces Download PDFInfo
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- US20030015368A1 US20030015368A1 US09/907,796 US90779601A US2003015368A1 US 20030015368 A1 US20030015368 A1 US 20030015368A1 US 90779601 A US90779601 A US 90779601A US 2003015368 A1 US2003015368 A1 US 2003015368A1
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- tension
- neckpiece
- earpiece
- pivot
- adjusting
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
- A61B7/02—Stethoscopes
- A61B7/04—Electric stethoscopes
Definitions
- the present invention relates to a tension-adjustable mechanism for the earpieces of a stethoscope.
- the present invention also relates to a stethoscope headset comprising this mechanism.
- the two earpieces comprise respective weakened proximal end portions inserted side by side in a longitudinally movable sleeve. Longitudinal movement of the sleeve on the weakened end portions of the earpieces change the amplitude of the tension on the earpieces when these earpieces are spread apart from each other.
- a tension-adjusting mechanism for an elongated stethoscope earpiece having a proximal end comprises a stethoscope neckpiece, a pivot mechanism portion, a spring mechanism portion, and a tension-adjusting mechanism portion.
- the pivot mechanism portion is interposed between the proximal end of the earpiece and the neckpiece, and defines a pivot axis about which the earpiece pivots relative to the neckpiece.
- the spring mechanism portion is interposed between the proximal end of the earpiece and the neckpiece, and comprises a spring member which deforms upon pivoting of the earpiece about the neckpiece in an outward direction.
- Deformation of the spring member produces a tension on the earpiece opposing to further pivoting of the earpiece in the outward direction.
- the tension-adjusting mechanism portion it is interposed between the spring member and the neckpiece and defines a plurality of interchangeable point of contacts with the spring member. These points of contacts with the spring member have different positions relative to the neckpiece.
- pivot mechanism portion spring mechanism portion
- tension-adjusting mechanism portion provide for the level of versatility required to fulfill the requirements, needs and/or preferences of a wide range of users.
- the pivot mechanism portion comprises abutment surfaces restricting, by abutment, free pivotal movement of the earpiece about the neckpiece within given limits.
- the pivot mechanism portion comprises a pivot pin pivotally mounted on the neckpiece, and a pivot tube pivotally mounted on the pivot pin and connected to the proximal end of the earpiece;
- the spring member comprises a resilient blade having one end formed with the pivot pin
- the pivot tube has an open, axial slot through which the resilient blade extends when the pivot pin is inserted in that pivot tube, the resilient blade has a thickness, and the slot has a width larger than the thickness of the blade to allow limited pivotal movement of the pivot tube about the pivot pin;
- the pivot tube has an annular end face provided with a lug
- the neckpiece has a pair of abutment surfaces situated on opposite sides of the lug
- the lug abuts on either abutment surface to restrict pivotal movement of the pivot tube about the neckpiece within predetermined limits.
- the present invention further relates to a headset for electronic stethoscope, comprising first and second elongated stethoscope earpieces each having a proximal end, and the above described tension-adjusting mechanism for each elongated stethoscope earpiece.
- the stethoscope neckpiece is common to both the first and second elongated stethoscope earpieces, the neckpiece comprises a hollow shell formed with openings for the proximal ends of the earpieces, and the hollow shell comprises a front shell portion and a rear shell portion assembled together to form that hollow shell.
- the resilient blade associated to the first earpiece has a first distal end section opposite to the pivot pin;
- the resilient blade associated to the second earpiece has a second distal end section opposite to the pivot pin;
- the tension-adjusting mechanism portion associated to both the first and second earpieces comprises a tension-adjusting cam having a geometrical axis, rotatable about this geometrical axis and lockable in either first, second and third angular positions;
- the tension-adjusting cam comprises an axial member having an outer tubular surface and two first points of contact with the first and second distal end sections, respectively, formed by two points of this outer tubular surface, respectively, when the tension-adjusting cam is locked in the first angular position;
- the axial member of the tension-adjusting cam comprises, on its outer tubular surface, first and second diametrically opposite, axial and radial fins of intermediate height having respective first and second free axial edge surfaces, and two second points of contact with the first and second distal end sections, respectively, formed by these first and second free axial edge surfaces of the first fin, respectively, when the tension-adjusting cam is locked in the second angular position;
- the axial member of the tension-adjusting cam comprises, on its outer tubular surface, third and fourth geometically opposite, axial and radial fins of larger height with third and fourth free axial edge surfaces, respectively, and two third points of contact with the first and second distal end sections, respectively, formed by these third and fourth free axial edge surfaces of the second fin, respectively, when the tension-adjusting cam is locked in the third angular position;
- the neckpiece comprises a hole with peripheral notches
- the tension-adjusting cam comprises lugs engaging the peripheral notches of the hole in the neckpiece to lock the tension-adjusting cam in either the first, second and third angular positions
- the tension-adjusting mechanism associated to both the first and second earpieces comprises a spring element interposed between the neckpiece and the tension-adjusting cam and spring biasing the lugs of this tension-adjusting cam in the notches of the hole in the neckpiece, whereby, to be rotated, the tension-adjusting cam is moved against the spring-biasing force produced by the spring element to disengage the lugs from the notches and is rotated and then released to engage the lugs with other notches.
- FIG. 1 is an exploded view of a headset for electronic stethoscope in accordance with the present invention
- FIG. 2 is a first inner elevation view of a rear shell portion of a neckpiece of the headset of FIG. 1, showing a tension-adjusting cam in a first angular position;
- FIG. 3 is an inner elevation view of a front shell portion of the neckpiece of the headset of FIG. 1;
- FIG. 4 is a second inner elevation view of the rear shell portion of the neckpiece of the headset of FIG. 1, showing the tension-adjusting cam in a second angular position;
- FIG. 5 is a third inner elevation view of the rear shell portion of the neckpiece of the headset of FIG. 1, showing the tension-adjusting cam in a third angular position.
- the tension-adjustable headset for electronic stethoscope is generally identified by the reference 10 .
- the headset 10 comprises two earpieces 11 a and 11 b . Since these two earpieces 11 a and 11 b and the associated mechanisms are identical but symmetrical, they will be described concurrently.
- the references related to the earpiece 11 a bear the indicia “a” while the references related to the earpiece 11 b bear the indicia “b”.
- the earpiece 11 a , 11 b is constituted by an elongated, arched member advantageously made of slightly flexible plastic material.
- the earpiece 11 a , 11 b comprises a distal cup-shaped end 12 a , 12 b to receive an earphone assembly 13 a , 13 b .
- the earphone assembly 13 a , 13 b comprises a speaker 14 a , 14 b , a speaker housing 15 a , 15 b and an eartip 16 a , 16 b.
- the distal cup-shaped end 12 a , 12 b comprises an inner shouldered rim 17 a , 17 b .
- the speaker housing 15 a , 15 b comprises a proximal cup-shaped portion 21 a , 21 b with an outer shouldered rim 18 a , 18 b .
- the shouldered rims 17 a , 17 b and 18 a , 18 b are configured to mate each other.
- the speaker housing 15 a , 15 b finally comprises an axial, distal tube 19 a , 19 b with a distal, externally protruding rim 20 a , 20 b.
- the speaker 14 a , 14 b is first placed in the cup-shaped end 12 a , 12 b of the earpiece 11 a , 11 b .
- the shouldered rim 18 a , 18 b of the speaker housing 15 a , 15 b is then glued or otherwise secured to the shouldered rim 17 a , 17 b of the cup-shaped end 12 a , 12 b .
- the cup-shaped end 12 a , 12 b and portion 21 a , 21 b then define a cavity in which the speaker 14 a , 14 b snugly fits.
- the eartip 16 a , 16 b is placed on the tube 19 a , 19 b .
- the eartip 16 a , 16 b is tubular and has an inner configuration adapted to fit on the tube 19 a , 19 b .
- the distal, externally protruding rim 20 a , 20 b will hold the eartip 16 a , 16 b on the tube 19 a , 19 b.
- the eartip 16 a , 16 b is made of soft, resilient material such as foam, for ensuring comfort of the user's ear.
- the earpiece 11 a , 11 b has a longitudinal channel 22 a , 22 b on the inner face of that earpiece 11 a , 11 b .
- the shouldered rims 17 a , 17 b and 18 a , 18 b are structured to form an opening (see 23 a , 23 b ) through which the channel 22 a , 22 b communicates with the cavity defined by the cup-shaped end 12 a , 12 b and portion 21 a , 21 b when secured to each other.
- This opening 23 a , 23 b and the channel 22 a , 22 b define a passage for electrical wires connected to the speaker 14 a , 14 b along the earpiece 11 a , 11 b.
- the proximal end of the earpiece 11 a , 11 b is provided with an integral, transversally extending pivot tube 24 a , 24 b . Therefore, the earpiece 11 a , 11 b and the pivot tube 24 a , 24 b are made of a single piece of plastic material.
- the pivot tube 24 a , 24 b includes an annular flat face 25 a , 25 b with a semicircular lug 26 a , 26 b .
- the pivot tube 24 a , 24 b has also an annular face 27 a , 27 b from which an open, axial slot 28 a , 28 b extends.
- the position and width of the slot 28 a , 28 b corresponds to the position and length of the semicircular lug 26 a , 26 b .
- a relatively thin wall 29 a , 29 b is left between the inner end of the slot 28 a , 28 b and the annular face 25 a , 25 b.
- This spring blade 30 a , 30 b is made of molded and resilient plastic material and has at the proximal end thereof an integral, proximal and transversally extending cylindrical pivot pin 31 a , 31 b . Accordingly, the spring blade 30 a , 30 b and the pivot pin 31 a , 31 b are made of a single piece of plastic material.
- the spring blade 30 a , 30 b has a constant width but a thickness which gradually thins from the pivot pin 31 a , 31 b to the distal end of that blade.
- the blade 30 a , 30 b further comprises a lateral extension 32 a , 32 b adjacent to the pivot pin 31 a , 31 b .
- the pivot pin 31 a , 31 b has a semicircular groove 33 a , 33 b.
- the pivot pin 31 a , 31 b is inserted in the pivot tube 24 a , 24 b , with the blade 30 a , 30 b including the lateral extension 32 a , 32 b extending through the slot 28 a , 28 b .
- the width of the blade 30 a , 30 b and lateral extension 32 a , 32 b is equal to the length of the slot 28 a , 28 b .
- the width of the slot 28 a , 28 b is larger that the thickness of the blade 30 a , 30 b whereby free pivotal movement of the pivot tube 24 a , 24 b about the pivot pin 31 a , 31 b is allowed within predetermined limits.
- the electrical wires connected the speaker 14 a , 14 b and running through the channel 22 a , 22 b leave the channel 22 a , 22 b at the proximal end of the earpiece 11 a , 11 b through a first hole 37 a , 37 b in the pivot tube 24 a , 24 b , the semicircular groove 33 a , 33 b in the pivot pin 31 a , 31 b, and a hole 38 a , 38 b in the pivot tube 24 a , 24 b to thereby reach the inside of a shell 35 , 36 of a neckpiece 34 , common to the two earpieces 11 a and 11 b.
- the headset 10 comprises the stethoscope neckpiece 34 of which the shell 35 , 36 comprises a rear triangular shell portion 35 and a front triangular shell portion 36 .
- the triangular shell portions 35 and 36 define an opening 39 a , 39 b at an upper corner thereof and through which the proximal end of the earpiece 11 a , 11 b and the pivot tube 24 a , 24 b extend.
- the shell portion 36 comprises an inner cylindrical blind hole 40 a , 40 b to receive a first end of the pivot pin 31 a , 31 b .
- the shell portion 35 comprises an inner cylindrical blind hole 41 a , 41 b (FIG. 3) coaxial with blind hole 40 a , 40 b and receiving the second end of pivot pin 31 a , 31 b. Accordingly, when shell portion 35 is assembled to shell portion 36 , the pivot pin 31 a , 31 b is free to pivot in the blind holes 40 a , 40 b and 41 a , 41 b .
- Pivotal movement of the pivot pin 31 a , 31 b in the coaxial blind holes 40 a , 40 b and 41 a , 41 b is restricted within a given angle, that is within predetermined limits by the semicircular lug 26 a , 26 b which abuts on faces 42 a , 42 b and 43 a , 43 b situated on opposite sides of the lug 26 a , 26 b.
- pivot pin 31 a , 31 b , the pivot tube 24 a , 24 b , and the cylindrical blind holes 40 a , 40 b and 41 a , 41 b define a pivot axis about which the earpiece 11 a , 11 b pivots relative to the neckpiece 34 .
- the shell portion 36 further comprises a lower cylindrical hole 44 defining an inwardly extending cylindrical wall 45 having an inner annular edge formed with three 600 spaced apart pairs of diametrically opposite notches such as 46 .
- a tension-adjusting cam 47 is disposed in the cylindrical hole 44 and is rotatable about its geometrical axis.
- Cam 47 comprises a circular flat wall 48 and an outer cylindrical wall 89 inwardly extending from the periphery of the circular flat wall 48 and having an annular edge surface formed with a pair of diametrically opposite and outwardly radially extending lugs 49 .
- Cam 47 finally comprises a central inner tube 50 coaxial with the cylindrical wall 89 and inwardly extending from the flat wall 48 .
- the shell portion 36 further comprises pegs 54 to receive a printed circuit board 53 .
- the printed circuit board 53 comprises corresponding notches and/or holes such as 55 to receive the pegs 54 .
- the electric wires from hole 38 a and 38 b can be connected to this printed circuit board 53 .
- the shell portion 35 comprises holes 62 and 63 for receiving push-buttons 64 and 65 , respectively.
- Push-buttons 62 and 63 operate corresponding switches such as 66 mounted on the printed circuit board.
- the headset 10 further comprises a T-shaped anchor 56 formed of a transversal section 57 and a vertical tube 58 perpendicular to section 57 .
- the tube 58 fits in a bottom opening of the shell 35 , 36 .
- This bottom opening is formed by semi-cylindrical opening portion 60 (FIG. 3) of shell portion 35 and semi-cylindrical opening portion 61 (FIGS. 1 and 4) of shell portion 36 .
- the section 57 it is shaped to fit inside the shell portions 35 and 36 just above the bottom opening 60 , 61 .
- wires from the printed circuit board 53 can run toward the exterior through a hole 59 in the transversal section 57 and then through the tube 58 .
- the outer surface of the tube 58 is structured to connect to a biological or other sound sensor (not shown).
- the shell portion 35 comprises four holes 67 for receiving four screws 68 .
- the shell portion 35 comprises four threaded holes 69 in which the four screws 68 are screwed upon assembling the shell portions 35 and 36 together.
- the shell portion 35 comprises, as shown in FIG. 3, an inwardly extending tube 70 in which a coil spring 71 is installed.
- the tube 70 is inserted in tube 50 through a circular hole 73 in the printed circuit board 53 , whereby the coil spring extends in both tubes 50 and 70 to push and hold (spring bias) the lugs 49 in one pair of notches 46 and therefore the cam 47 in position in the cylindrical hole 44 .
- Cam 47 is positioned in cylindrical hole 44 from the inside of the shell half 36 with the pair of diametrically opposite lugs 49 inserted in one of the pair of diametrically opposite notches 46 ;
- the pivot pin 31 a is disposed in pivot tube 24 a , with the blade 30 a and lateral extension 32 a in the slot 28 a and with the blade 30 a lying on the same side of the tube 50 as blind hole 40 a;
- pivot pin 31 a The corresponding end of pivot pin 31 a is positioned in blind hole 40 a;
- the pivot pin 31 b is disposed in pivot tube 24 b , with the blade 30 b and lateral extension 32 b in the slot 28 b and with the blade 30 a lying on the same side of tube 50 as blind hole 40 b;
- pivot pin 31 b is positioned in blind hole 40 b;
- the tube 58 of anchor 56 is placed in semicircular opening portion 61 with one end of the transversal section 57 fitted inside the shell portion 36 above this opening portion 61 ;
- the notches and/or holes 55 of the printed circuit board 53 are engaged with the pegs 54 of the shell portion 36 to thereby mount this printed circuit board 53 in the shell portion 36 ;
- the push-buttons 64 and 65 are placed in the holes 62 and 63 , respectively;
- One end of the spring 71 is placed in the tube 70 ;
- the shell portion 35 is placed on the shell portion 36 with:
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a tension-adjustable mechanism for the earpieces of a stethoscope. The present invention also relates to a stethoscope headset comprising this mechanism.
- 2. Brief Description of the Prior Art
- A tension-adjustable mechanism for the earpieces of a stethoscope has been proposed in the following prior art patent:
- U.S. Pat. No. 5,561,275 (Savage et al.) Oct. 1, 1996
- According to this prior art mechanism, the two earpieces comprise respective weakened proximal end portions inserted side by side in a longitudinally movable sleeve. Longitudinal movement of the sleeve on the weakened end portions of the earpieces change the amplitude of the tension on the earpieces when these earpieces are spread apart from each other.
- Although this prior art tension-adjusting mechanism is efficient, further adjustment capability is often required to meet with the requirements, needs and/or preferences of a wide range of users.
- Therefore, need exists for a more versatile tension-adjusting mechanism capable of fulfilling the requirements, needs and/or preferences of a wide range of users.
- In accordance with the present invention, there is provided a tension-adjusting mechanism for an elongated stethoscope earpiece having a proximal end. This tension-adjusting mechanism comprises a stethoscope neckpiece, a pivot mechanism portion, a spring mechanism portion, and a tension-adjusting mechanism portion. The pivot mechanism portion is interposed between the proximal end of the earpiece and the neckpiece, and defines a pivot axis about which the earpiece pivots relative to the neckpiece. The spring mechanism portion is interposed between the proximal end of the earpiece and the neckpiece, and comprises a spring member which deforms upon pivoting of the earpiece about the neckpiece in an outward direction. Deformation of the spring member produces a tension on the earpiece opposing to further pivoting of the earpiece in the outward direction. Regarding the tension-adjusting mechanism portion, it is interposed between the spring member and the neckpiece and defines a plurality of interchangeable point of contacts with the spring member. These points of contacts with the spring member have different positions relative to the neckpiece.
- The above mentioned pivot mechanism portion, spring mechanism portion, and tension-adjusting mechanism portion provide for the level of versatility required to fulfill the requirements, needs and/or preferences of a wide range of users.
- Preferably, the pivot mechanism portion comprises abutment surfaces restricting, by abutment, free pivotal movement of the earpiece about the neckpiece within given limits.
- According to other preferred embodiments of the tension-adjusting mechanism:
- the pivot mechanism portion comprises a pivot pin pivotally mounted on the neckpiece, and a pivot tube pivotally mounted on the pivot pin and connected to the proximal end of the earpiece;
- the spring member comprises a resilient blade having one end formed with the pivot pin;
- the pivot tube has an open, axial slot through which the resilient blade extends when the pivot pin is inserted in that pivot tube, the resilient blade has a thickness, and the slot has a width larger than the thickness of the blade to allow limited pivotal movement of the pivot tube about the pivot pin; and
- the pivot tube has an annular end face provided with a lug, the neckpiece has a pair of abutment surfaces situated on opposite sides of the lug, and the lug abuts on either abutment surface to restrict pivotal movement of the pivot tube about the neckpiece within predetermined limits.
- The present invention further relates to a headset for electronic stethoscope, comprising first and second elongated stethoscope earpieces each having a proximal end, and the above described tension-adjusting mechanism for each elongated stethoscope earpiece.
- Preferably, the stethoscope neckpiece is common to both the first and second elongated stethoscope earpieces, the neckpiece comprises a hollow shell formed with openings for the proximal ends of the earpieces, and the hollow shell comprises a front shell portion and a rear shell portion assembled together to form that hollow shell.
- In accordance with a preferred embodiment:
- the resilient blade associated to the first earpiece has a first distal end section opposite to the pivot pin;
- the resilient blade associated to the second earpiece has a second distal end section opposite to the pivot pin;
- the tension-adjusting mechanism portion associated to both the first and second earpieces comprises a tension-adjusting cam having a geometrical axis, rotatable about this geometrical axis and lockable in either first, second and third angular positions;
- the tension-adjusting cam comprises an axial member having an outer tubular surface and two first points of contact with the first and second distal end sections, respectively, formed by two points of this outer tubular surface, respectively, when the tension-adjusting cam is locked in the first angular position;
- the axial member of the tension-adjusting cam comprises, on its outer tubular surface, first and second diametrically opposite, axial and radial fins of intermediate height having respective first and second free axial edge surfaces, and two second points of contact with the first and second distal end sections, respectively, formed by these first and second free axial edge surfaces of the first fin, respectively, when the tension-adjusting cam is locked in the second angular position;
- the axial member of the tension-adjusting cam comprises, on its outer tubular surface, third and fourth geometically opposite, axial and radial fins of larger height with third and fourth free axial edge surfaces, respectively, and two third points of contact with the first and second distal end sections, respectively, formed by these third and fourth free axial edge surfaces of the second fin, respectively, when the tension-adjusting cam is locked in the third angular position;
- the neckpiece comprises a hole with peripheral notches, and the tension-adjusting cam comprises lugs engaging the peripheral notches of the hole in the neckpiece to lock the tension-adjusting cam in either the first, second and third angular positions; and
- the tension-adjusting mechanism associated to both the first and second earpieces comprises a spring element interposed between the neckpiece and the tension-adjusting cam and spring biasing the lugs of this tension-adjusting cam in the notches of the hole in the neckpiece, whereby, to be rotated, the tension-adjusting cam is moved against the spring-biasing force produced by the spring element to disengage the lugs from the notches and is rotated and then released to engage the lugs with other notches.
- The foregoing and other objects, advantages and features of the present invention will become more apparent upon reading of the following non-restrictive description of a preferred embodiment thereof, given for the purpose of illustration only with reference to the accompanying drawings.
- In the appended drawings:
- FIG. 1 is an exploded view of a headset for electronic stethoscope in accordance with the present invention;
- FIG. 2 is a first inner elevation view of a rear shell portion of a neckpiece of the headset of FIG. 1, showing a tension-adjusting cam in a first angular position;
- FIG. 3 is an inner elevation view of a front shell portion of the neckpiece of the headset of FIG. 1;
- FIG. 4 is a second inner elevation view of the rear shell portion of the neckpiece of the headset of FIG. 1, showing the tension-adjusting cam in a second angular position; and
- FIG. 5 is a third inner elevation view of the rear shell portion of the neckpiece of the headset of FIG. 1, showing the tension-adjusting cam in a third angular position.
- Preferred embodiments of the tension-adjustable mechanism for an elongated stethoscope earpiece and headset for electronic stethoscope according to the present invention will now be described with reference to the appended drawings. Just a word to mention that the present invention equally apply to non electronic stethoscopes.
- In the appended drawings, the tension-adjustable headset for electronic stethoscope is generally identified by the
reference 10. - The
headset 10 comprises twoearpieces earpieces earpiece 11 a bear the indicia “a” while the references related to theearpiece 11 b bear the indicia “b”. - The
earpiece - The
earpiece shaped end speaker 14 a,14 b, a speaker housing 15 a,15 b and an eartip 16 a,16 b. - The distal cup-
shaped end shouldered rim shaped portion shouldered rim 18 a,18 b. Theshouldered rims distal tube 19 a,19 b with a distal, externally protrudingrim 20 a,20 b. - To assemble the earphone assembly13 a,13 b, the
speaker 14 a,14 b is first placed in the cup-shapedend earpiece shouldered rim 18 a,18 b of the speaker housing 15 a,15 b is then glued or otherwise secured to theshouldered rim end end portion speaker 14 a,14 b snugly fits. Finally, the eartip 16 a,16 b is placed on thetube 19 a,19 b. Of course, the eartip 16 a,16 b is tubular and has an inner configuration adapted to fit on thetube 19 a,19 b. Those of ordinary skill in the art will appreciate that the distal, externally protrudingrim 20 a,20 b will hold the eartip 16 a,16 b on thetube 19 a,19 b. - Just a word to mention that the eartip16 a,16 b is made of soft, resilient material such as foam, for ensuring comfort of the user's ear.
- The
earpiece longitudinal channel earpiece rims channel end portion channel speaker 14 a,14 b along theearpiece - Pivot Mechanism Portion:
- The proximal end of the
earpiece pivot tube 24 a,24 b. Therefore, theearpiece pivot tube 24 a,24 b are made of a single piece of plastic material. On a first side, thepivot tube 24 a,24 b includes an annularflat face semicircular lug 26 a,26 b. On the second side, thepivot tube 24 a,24 b has also anannular face 27 a,27 b from which an open,axial slot slot semicircular lug 26 a,26 b. A relativelythin wall slot annular face - A
spring blade spring blade spring blade spring blade blade lateral extension semicircular groove 33 a,33 b. - The pivot pin31 a,31 b is inserted in the
pivot tube 24 a,24 b, with theblade lateral extension slot blade lateral extension slot slot blade pivot tube 24 a,24 b about the pivot pin 31 a,31 b is allowed within predetermined limits. - The electrical wires connected the
speaker 14 a,14 b and running through thechannel channel earpiece first hole 37 a,37 b in thepivot tube 24 a,24 b, thesemicircular groove 33 a,33 b in the pivot pin 31 a,31 b, and ahole pivot tube 24 a,24 b to thereby reach the inside of ashell neckpiece 34, common to the twoearpieces - The
headset 10 comprises thestethoscope neckpiece 34 of which theshell triangular shell portion 35 and a fronttriangular shell portion 36. When assembled together, thetriangular shell portions opening earpiece pivot tube 24 a,24 b extend. In the proximity of the opening 39 a,39 b, theshell portion 36 comprises an inner cylindricalblind hole shell portion 35 comprises an inner cylindricalblind hole blind hole shell portion 35 is assembled to shellportion 36, the pivot pin 31 a,31 b is free to pivot in theblind holes blind holes semicircular lug 26 a,26 b which abuts on faces 42 a,42 b and 43 a,43 b situated on opposite sides of thelug 26 a,26 b. - It should be pointed out here that the pivot pin31 a,31 b, the
pivot tube 24 a,24 b, and the cylindricalblind holes earpiece neckpiece 34. - Tension-Adjusting Mechanism Portion:
- The
shell portion 36 further comprises a lowercylindrical hole 44 defining an inwardly extendingcylindrical wall 45 having an inner annular edge formed with three 600 spaced apart pairs of diametrically opposite notches such as 46. - A tension-adjusting
cam 47 is disposed in thecylindrical hole 44 and is rotatable about its geometrical axis.Cam 47 comprises a circular flat wall 48 and an outer cylindrical wall 89 inwardly extending from the periphery of the circular flat wall 48 and having an annular edge surface formed with a pair of diametrically opposite and outwardly radially extendinglugs 49.Cam 47 finally comprises a centralinner tube 50 coaxial with the cylindrical wall 89 and inwardly extending from the flat wall 48. - When the diametrically opposite lugs49 are disposed in a first pair of diametrically
opposite notches 46 as shown in FIG. 2, the cam is locked in a first angular position. The point of contact with the distal end section of theblade tube 50 when the tension-adjustingcam 47 is locked in the first angular position. This corresponds to the larger extent of spreading apart of theearpieces blades earpieces - When the diametrically opposite lugs49 are disposed in a second pair of diametrically
opposite notches 46 as illustrated in FIG. 4, the cam is locked in a second angular position. Theblades radial fins 51 of intermediate height formed on the outer tubular surface of thetube 50. The points of contact with the distal end sections of theblade fins 51 when the tension-adjustingcam 47 is locked in the second angular position. This corresponds to an intermediate extent of spreading apart of theearpieces blades earpieces - When the diametrically opposite lugs49 are disposed in a third pair of diametrically
opposite notches 46 as illustrated in FIG. 5, thecam 47 is locked in a third angular position. Theblades radial fins 52 of larger height formed on the outer tubular surface of thetube 50. The points of contact with the distal end sections of theblade fins 52 when the tension-adjustingcam 47 is locked in the second angular position. This corresponds to an intermediate extent of spreading apart of theearpieces blades earpieces - The
shell portion 36 further comprisespegs 54 to receive a printedcircuit board 53. Of course, the printedcircuit board 53 comprises corresponding notches and/or holes such as 55 to receive thepegs 54. The electric wires fromhole circuit board 53. - The
shell portion 35 comprisesholes buttons buttons - The
headset 10 further comprises a T-shapedanchor 56 formed of atransversal section 57 and avertical tube 58 perpendicular tosection 57. Thetube 58 fits in a bottom opening of theshell shell portion 35 and semi-cylindrical opening portion 61 (FIGS. 1 and 4) ofshell portion 36. Regarding thesection 57, it is shaped to fit inside theshell portions bottom opening circuit board 53 can run toward the exterior through ahole 59 in thetransversal section 57 and then through thetube 58. Just a word to mention that the outer surface of thetube 58 is structured to connect to a biological or other sound sensor (not shown). - Referring to FIG. 1, the
shell portion 35 comprises fourholes 67 for receiving fourscrews 68. Referring to FIG. 3, theshell portion 35 comprises four threadedholes 69 in which the fourscrews 68 are screwed upon assembling theshell portions - Finally, the
shell portion 35 comprises, as shown in FIG. 3, an inwardly extendingtube 70 in which acoil spring 71 is installed. When theshell portions tube 70 is inserted intube 50 through acircular hole 73 in the printedcircuit board 53, whereby the coil spring extends in bothtubes lugs 49 in one pair ofnotches 46 and therefore thecam 47 in position in thecylindrical hole 44. To rotate thecam 47 and displace the diametrically opposite lugs 49 from one pair of diametricallyopposite notches 46 to the other, one has only to push from the outside thecam 47 until thelugs 49 are withdrawn form thenotches 46 and, then, rotatecam 47 clockwise or counterclockwise about its axis until the pair or diametrically opposite lugs 49 can be released to engage the desired pair of diametricallyopposite notches 46. The outside face of the circular flat wall 48 can be grooved along a diameter in the same manner as the head of a screw. A coin can then be used in cooperation with this groove (not shown) to facilitate this operation. - To assemble the
neckpiece 34, the following operations are performed: -
Cam 47 is positioned incylindrical hole 44 from the inside of theshell half 36 with the pair of diametrically opposite lugs 49 inserted in one of the pair of diametricallyopposite notches 46; - The pivot pin31 a is disposed in
pivot tube 24 a, with theblade 30 a andlateral extension 32 a in theslot 28 a and with theblade 30 a lying on the same side of thetube 50 asblind hole 40 a; - The corresponding end of pivot pin31 a is positioned in
blind hole 40 a; - The pivot pin31 b is disposed in pivot tube 24 b, with the
blade 30 b andlateral extension 32 b in theslot 28 b and with theblade 30 a lying on the same side oftube 50 asblind hole 40 b; - The corresponding end of pivot pin31 b is positioned in
blind hole 40 b; - The
tube 58 ofanchor 56 is placed insemicircular opening portion 61 with one end of thetransversal section 57 fitted inside theshell portion 36 above this openingportion 61; - The notches and/or holes55 of the printed
circuit board 53 are engaged with thepegs 54 of theshell portion 36 to thereby mount this printedcircuit board 53 in theshell portion 36; - The push-
buttons holes - One end of the
spring 71 is placed in thetube 70; - The
shell portion 35 is placed on theshell portion 36 with: - The free end of the
coil spring 71 and thetube 70 of theshell portion 35 inserted intube 50 of thecam 47; - The corresponding end of pivot pin31 a positioned in
blind hole 41 a; - The corresponding end of pivot pin31 b positioned in
blind hole 41 b; - The
tube 58 ofanchor 56 placed insemicircular opening portion 60, and the corresponding end of thetransversal section 57 fitted inside theshell portion 35 above this openingportion 60; - The push-
buttons switches 66; and - Finally, the four (4) screws68 are placed in the four (4)
respective holes 67 and, then, screwed in the four (4) respective threaded holes 69. - In operation, restricted free pivotal movement of the
pivot tube 24 a about the pivot pin 31 a, and restricted free pivotal movement of thepivot tube 24 a about the pivot pin 31 b, restricted pivotal movement of thepivot tube 24 a about theneckpiece 34 due to the abutment action of thesemicircular lug 26 a andsurface 42 a, restricted pivotal movement of the pivot tube 24 b about theneckpiece 34 due to the abutment action of the semicircular lug 26 b and surface 42 b allow theearpieces neckpiece 34 about a given, relatively small angle. - Spring Mechanism Portion:
- When the diametrically opposite lugs49 of the
cam 47 are disposed in the first pair of diametricallyopposite notches 46 as shown in FIG. 2, spreading apart of theearpieces resilient blades tube 50. The earpieces are then separated by a larger angular spacing. From this larger angular spacing, further spreading apart of theearpieces blades earpieces - When the diametrically opposite lugs49 of the
cam 47 are disposed in the second pair of diametricallyopposite notches 46 as shown in FIG. 4, spreading apart of theearpieces blades radial fins 51 of intermediate height. Theearpieces earpieces blades earpieces - When the diametrically opposite lugs49 of the
cam 47 are disposed in the third pair of diametricallyopposite notches 46 as shown in FIG. 5, spreading apart of theearpieces blades radial fins 52 of larger height. Theearpieces earpieces blades earpieces - Accordingly, rotation of the
cam 47 about its axis to displace the diametrically opposite lugs 49 from one pair of diametricallyopposite notches 46 to the other, will change the angular spacing between theearpieces button 47 in accordance with his requirements, needs and/or preferences. - Although the present invention has been described hereinabove by way of a preferred embodiment thereof, this embodiment can be modified at will, within the scope of the appended claims, without departing from the spirit and nature of the subject invention.
Claims (23)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/907,796 US6595316B2 (en) | 2001-07-18 | 2001-07-18 | Tension-adjustable mechanism for stethoscope earpieces |
PCT/CA2002/001101 WO2003013359A1 (en) | 2001-07-18 | 2002-07-17 | Tension-adjustable mechanism for stethoscope earpieces |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/907,796 US6595316B2 (en) | 2001-07-18 | 2001-07-18 | Tension-adjustable mechanism for stethoscope earpieces |
Publications (2)
Publication Number | Publication Date |
---|---|
US20030015368A1 true US20030015368A1 (en) | 2003-01-23 |
US6595316B2 US6595316B2 (en) | 2003-07-22 |
Family
ID=25424645
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/907,796 Expired - Fee Related US6595316B2 (en) | 2001-07-18 | 2001-07-18 | Tension-adjustable mechanism for stethoscope earpieces |
Country Status (2)
Country | Link |
---|---|
US (1) | US6595316B2 (en) |
WO (1) | WO2003013359A1 (en) |
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